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The ENIGMA I multi-center trial (Evaluation of Nitrous Oxide in the Gas Mixture for Anesthesia) showed that inclusion of nitrous oxide in the gas mixture during general anaesthesia led to no differences in the patient's length of stay (as a combined endpoint of complications).
Anesthesiology 2007
Anesthesiology 2007
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Patients randomised in two groups.
Volatile agent plus either 80/20:Oxygen/Nitrogen or 30/70:Oxygen/Nitrous oxide for surgery >2hrs in duration.
Volatile agent plus either 80/20:Oxygen/Nitrogen or 30/70:Oxygen/Nitrous oxide for surgery >2hrs in duration.
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Flawed because two variables were modified. Both the [O2] concentration and [N2O] concentration were modified meaning outcome differences could be attributed to either variable.
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